General Chemistry Answers

Silver is a metal commonly used in jewelry and photography. It crystallizes with a FCC unit cell 0.407 nm on an edge. What is the theoretical density (g/mL) of silver in g/cm3 if its atomic weight is 107.87 g/mol?

1.00 mL of a 3.50  10–4 M solution of oleic acid is diluted with 9.00 mL of petroleum ether,

forming solution A. Then 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether,

forming solution B. What is the concentration of solution B?

Ammonium perchlorate NH4ClO4 is the solid rocket fuel used by the U.S. Space Shuttle. It reacts with itself to produce nitrogen gas N2, chlorine gas Cl2, oxygen gas O2, water H2O, and a great deal of energy.

What mass of water is produced by the reaction of 8.66g of ammonium perchlorate?

What is the molar concentration of As(III)

As(III) in a solution if 29.80 mL

mL of 0.100 M

M KBrO

3

KBrO3 is needed to titrate 49.15 mL

mL of the As(III)

As(III) solution? 

 True or false: a pH equal to its pka the average charge on an ionizable amino acid sidechain will be zero

Ammonium phosphate NH43PO4 is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid H3PO4 with ammonia NH3.

What mass of ammonium phosphate is produced by the reaction of 5.3g of ammonia?

2. You have 1.0 ml of a stock solution of 0.5 mMp-nitrophenol. You need 200 of the solutions listed below . How do you make them up ?

25um

50um

75um

125um

250um

500um

12g of water is saturated by 15g of potassium chloride at 20c calculate the solubility of potassium chloride at 20c [k=39,cl=35.5]